Choanomphalus maacki

Choanomphalus maacki is a species of freshwater air-breathing snail, an aquatic pulmonate gastropod mollusk in the family Planorbidae, the ram's horn snails, or planorbids.

Choanomphalus maacki
an apertural view of the shell of Choanomphalus maacki maacki
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Gastropoda
(unranked):
clade Heterobranchia
clade Euthyneura
clade Panpulmonata
clade Hygrophila
Superfamily:
Planorboidea
Family:
Planorbidae
Subfamily:
Planorbinae
Tribe:
Planorbini
Genus:
Choanomphalus
Species:
C. maacki
Binomial name
Choanomphalus maacki
Gerstfeldt, 1859[2]
Synonyms[3]

of C. maacki maacki:

  • Choanomphalus bicarinatus W. Dybowski, 1901[4]
  • Choanomphalus mesospiralis B. Dybowski & Grochmalicki, 1925[5]

of C. maacki andrussowianus:

  • Choanomphalus elatospiralis B. Dybowski & Grochmalicki, 1925
  • Choanomphalus andrussovianus B. Dybowski & Grochmalicki, 1925

of C. maacki elatior:

  • Choanomphalus korotnevi elatior Lindholm, 1909

Choanomphalus maacki is the type species of the genus Choanomphalus.[3]

Subspecies
  • Choanomphalus maacki maacki Gerstfeldt, 1859[3]
  • Choanomphalus maacki andrussowianus (Lindholm, 1909)[3][6]
  • Choanomphalus maacki elatior Lindholm, 1909[3][6]

However, IUCN Red List 2013 lists these three as synonyms.[1]

Distribution

This species is found in Lake Baikal, Russia.[1] Its natural habitats are freshwater lakes and river mouths.[1]

Description

The width of the shell is 5–6 mm.[7] The height of the shell is 2.5–3.0 mm.[7]

Apical view of the shell.
Umbilical view of the shell.

References
  1. Vinarski M. & Sitnikova T. (2012). "Choanomphalus maacki". In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 31 May 2014.
  2. (in German) Gerstfeldt G. (1859). "Ueber Land- und Süsswasser-Mollusken Sibiriens und Amur-Gebietes". Mémoires des Savants étrangers 9: 507-548.
  3. Kantor Yu I., Vinarski M. V., Schileyko A. A. & Sysoev A. V. (published online on March 2, 2010). "Catalogue of the continental mollusks of Russia and adjacent territories". Version 2.3.1.
  4. (in German) Dybowski W. (1901). "Beschreibung neuer Choanomphalus-Arten". Nachrichtsblatt der Deutschen Malakozoologischen Gesellschaft 33(8): 119–125.
  5. (in Polish) Dybowski B. & Grochmalicki J. (1925). "Przyczynki doo znajomości mięczaków jeziora Bajkalskiego. (Contributions à la connaissance des Mollusques du lac Baical)". Wladislaviidae nom. fam. Kosmos (Lwow), 50: 819–881.
  6. (in German) Lindholm W. A. (1909). "Die Mollusken des Baikal-Sees (Gastropoda et Pelecypoda) systematisch und zoogeographisch bearb". Wissenschaftliche Ergebnisse einer zoologische Expedition nach dem Baikal-See unter Leitung des Prof. Alexis Korotneff i. d. J. 1900–1902, 4. Kiew und Berlin, Fridländer und Sohn: 1–104. page 10, plate 2, fig. 28–30; page 13, plate 2, fig. 25–27.
  7. (in French) Bourguignat J. R. (1860). "Monographie du genre Choanomphalus". Revue et Magasin de Zoologie, série 2, 12: 527–531. plate 23.

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